(See major companies that do.) However, Apple does hire for work-at-home positions in at least one division, its AppleCare support team. Most of its home-based customer service jobs, called Apple At-Home Advisors, are virtual call center positions; however there are also separate chat agent positions.
Stress fractures heal with time and rest. Athletes are advised to rest from any activity that caused the stress fracture for the 6-14 weeks that the fractures take to heal (ask your doctor how long your particular fracture will probably take to heal), or until pain-free for 2-3 weeks.
Sacral stress fractures heal much slower because it is so difficult to immobilize the effected area. Based on personal experience I would say it takes at least 2 months to 4-6 months in extreme cases. In order to prevent something like this from happening athletes should do a lot of corework. A strong core helps stabilize the area and alleviates some of the stress that the sacrum bears.